question_answer

Phenol can be converted to o-hydroxybenzaldehyde by

A)  Kolbes reaction

B)  Reimer-Tiemann reaction

C)  Wurtz reaction

D)  Cannizaro reaction

E)  Sandmeyers reaction

Correct Answer: B

Solution :

Treatment of phenol with chloroform in presence of aqueous\[NaOH\]or\[KOH\]at\[70{}^\circ C\] followed by      hydrolysis gives o-hydroxybenzaldehyde (salicylaldehyde) as the major product. This reaction is called Reimer-Tiemann reaction.